Grinding wheel guard



Oct. 13,1931. G. E. SMITH GRINDING WHEEL GUARD Filed Sept. 13, 1929INVENTOR ATTORNEY.

' ELECTRIGALTOOL COMPANY; 0 F "CINCIHNATLQHIO,A sconronnrlon' or 0 f i iHEE UAR This invention relat esto grinder appliances and isparticularlydirected-,to a guard or hood/for use on grinders, the[ guard havingfeatures of adjustability and adapted to encloseuthe' grinding oremerywheel for the p r pose of 1 preven'tingginj dry I to" the worker,and

pletely" protects the Worker" by efficiently housingTthe wheel toconform 'Jal1 the requiren ents of the safety code without loss Y ofefficiency or interference with 'the applifc'a tion' of the articles'tobel ground-tothewheel. 1 It is an obj ect' of this inventionto providea closure or guard for a grinding wheel which 1 is conveniently adadjustabl attachedto thefrarne oflthe'grinder.

The 'de'f si gned for rotative adjustment concentrically with "the"wheel for disposing the opening,

' through which the articles .to be groundxare applied, at the properangle and elevation.

It is another object of this invention to pro Vide a wheel guard of theabovenature which. is adjustable toward and from thefworking P 7 side ofthe wheel periphery to compensate for the Wear of the grinding'wheel andfor dis-, posing the guard in proximity to the wheel" the articles are,

adjacent the point wherev applied. o

It is another object of this lnvention to provide a guard arrangedso asto efliciently direct the dust and grinding accumulation and flyingparticles into an exhaust duct; the connection of which duct isadjustable relative to the wheel.

It is another object of this invention to provide a guard having a door;which door, in combination .with the adjustable upperv section of theguard, permitsthe removal and replacementof grinder wheels withoutmoving the entire guard fro'm'the grinder. j

Other objects and advantages relate to the general construction ofthedevice and will be apparent from the description .of the accompanyingdrawings, in which:

Figure 1 isa front vlew of the gu'ard in a. position on the frame orcasing of a grinder,

e the guard enclosing thewheel,

r collection of the dust, grind- 'ingfra'ginentaryof the grinder,"

-F'gure 2 '-1s a sect'onal. view t and form of the guard.'-

doorslightly open.

r The idevlce compr ses, in general; a main" casing 5' attachable to theframe of the grinder for surrounding the lower portion or mai ken i linep 2-2:, Figure "1, illustrating the; fabrication V Gnome E. SMITH, orcovInG onl'; IQi 'JPUG,KY,".assiieuqoiI110YTHE Umrrib STATES; 7

this view be jority of t the grind-ing Wheel 15, a cap {6 3dr.j'ust'ably'mount'ed' on themain casing for adjustment tangentially ofthel grinding,

wheelrelativeto the peripheral surface there'- ofand a door "7 hinged tothe main' 'casing v and openingendwise' or swinglng from an axial:position relative to the'l grinding wheel, Referring to the drawings anddescribing azparticular embodiment of the invention in i detail zthemain casing 5 includes a splitring portions extending from' thefinnerside e 7 ,thereof ya olanipingor draw bolt9 traversing. l

'theaiears. 10 ofithering portion; The ring r endgof'the' hub llfofthegrinder frame'ad i 'ortio'n 8 is vadapted to encircle theextendingjacent the inner 'fa'ce'Tot; the grinding wheel,

idisposing :'the"-' main";portion or the" casing qabout :therear andlowe i sides 'of the grinding l2-is providedpintegrally formed, 1 iwithtthew 'casingfandrdepending from the lower. portion thereof, thissnout extending from a throat 1-3,"which"throat is'to'wa rd the ,open'sideof"the casingand belOw'the g'rind- A; snout ing point. Any sort 'offfiexible conduit,

-=shown in: dot and dash lines at il lj'may be attached' to the snoutwhich is directed re'ari i wardly for conveying the grindings; dust,abrasive, etc, fro'm'the vicinityz 'ofthe'oper 5 atora'i A suctiondevice may be "provided at 'the end of the hose for forcibly removingvthe.

fly i ng pa'rticles withintheguar'd or'hood.

ITh'e door .7 is hinged to the main casing at bowl shape to clearthehubi 17 of the grinding :wheel and; straight out across its topin thesame plane with thej straightupper edge 1 8 one side'ithereof a's at'16,= this door beingofacross the topo? provided, one, namely, 19extending outwardly from the door, and the other, namely 20, extendingoutwardly from the casing 5, these lugs having their upper surfacesflush with the straight upper edges of the door and casing respectively.In the same plane with the lugs andstrai ght edge of the door, arearwardly extending surface is provided as the top of a lug 21 havingan elongated slot therein. The coverof adjustable section 6 of the guardis supported on the surfaces just described and has an adjustable andsliding hinge connection to the casing by virtue of'the followingarrangement.

A hinge bolt 22 for a rotative' connection of the cover plate to thecasing traverses the elongated slot 23 of the casing and is secured inspaced ears 24 extending downwardly from thecap. The lugs 19, of thecasing are provided with screw-threaded bores into which are screwedclamping screws 26 travers'ing elongated slots 27 in a horizontal flange28 of thecover plate. All the slots mentioned are disposed inparallelism for permitting slidin motion of the coverplate the casing,the rear. bolt providing the hinge. l

A lug 29 is provided in the outer periphery of the cover toward theforward end thereof, this lug having a bore therethrough for mountingthe holder for an eye shield (not shown) adapted to transparently coverthe point at which the work is being applied. 7

The manipulation ofthe guard is as follows:

Assuming that it is desired to place the entire guard on the machine, itis necessary-to remove the grinding wheel.v The guard is slid as a unitonto the end of the'bearing eX- tension" of the grinder frame, andclamped thereto by meansrof the draw bolt in the split ring The grindingwheel is placed in position on the driving shaftwith the cover liftedand the door swungsback as illustratedin the perspective view. The dooris thenswung shut and the cover plate slid on its supporting surfaceuntil its forward edge is properly spaced from the periphery ofthegrinding wheel, whereupon the bolts traversing, the

two forward slots are tightened, the hinge bolt being set in positionfor free swinging movement of the cap.

As wearing of the wheel takes place, the cover is moved inwardly.Theentire guard is rotatably adjusted for properly disposing the openside of the guard for efficient application of the work to the surfaceof the grinding wheel, this being done after loosening the clamping'bolton the split ring portion. The

exhaust passageway or snout may be at any point inasmuch as a flexiblehose is used.

Having described my invention, I claim: 1. In combination with agrinding wheel of a grinder, a cover for the grinding wheel, comprising,a main casing mounted on the reward frame of the grinder concentric tothe grinding wheel for rotative adjustment relative thereto, and aone-piece cap hinged on the main casing for enclosing the upper portionof the wheel and having its front edge adjustable-toward and from theperipheral surface of-the grinding wheel, said adjustmentmove ment ofthe cap adapted to be imparted entirely independent of the hingedmovement thereof.

2 A grinder wheel guard, comprising, a main casing having'its forwardside open, and a snout formed integral therewith extending from thelower rear side, said casing of sectional form, the upper sectionthereof hinged to the lower section for swinging movement away from thelower section for uncovering the grinder wheel and adjustabletransversely to the axis of grinder wheel rotationfor spacing theforward end of the upper section relative to the grinder wheelperiphery, and a door swinging outwardly from the end face of thecasing.

3. A grinder wheel guard, comprising, a main casing having a split ringattaching portion at one side, and a door hinged at the other side, acover slidably mounted on the top surface of the main casing, said coverslidably hinged to the main casing and providing flanges at itsforwardend, and attaching means traversing said flanges and enteringsaid main casing for securing the cap in position on the upper surfaceof the casing.

In witness whereof, I hereunto subscribe my name.

GEQRGE E. SMITH.

